Package org.optaplanner.core.api.domain.entity

Annotation Type PlanningEntity

@Target(TYPE)
@Retention(RUNTIME)
public @interface PlanningEntity

Specifies that the class is a planning entity. Each planning entity must have at least 1 PlanningVariable property.

The class should have a public no-arg constructor, so it can be cloned (unless the PlanningSolution.solutionCloner() is specified).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	PlanningEntity.NullDifficultyComparator	Workaround for annotation limitation in difficultyComparatorClass().
static interface	PlanningEntity.NullDifficultyWeightFactory	Workaround for annotation limitation in difficultyWeightFactoryClass().
static interface	PlanningEntity.NullPinningFilter	Workaround for annotation limitation in pinningFilter() ()}.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element	Description
Class<? extends Comparator>	difficultyComparatorClass	Allows a collection of planning entities to be sorted by difficulty.
Class<? extends SelectionSorterWeightFactory>	difficultyWeightFactoryClass	The SelectionSorterWeightFactory alternative for difficultyComparatorClass().
Class<? extends PinningFilter>	pinningFilter	A pinned planning entity is never changed during planning, this is useful in repeated planning use cases (such as continuous planning and real-time planning).

Element Details

pinningFilter

Class<? extends PinningFilter> pinningFilter

A pinned planning entity is never changed during planning, this is useful in repeated planning use cases (such as continuous planning and real-time planning).

This applies to all the planning variables of this planning entity. To pin individual variables, see https://issues.redhat.com/browse/PLANNER-124

The method PinningFilter.accept(Object, Object) returns false if the selection entity is pinned and it returns true if the selection entity is movable

Returns:

PlanningEntity.NullPinningFilter when it is null (workaround for annotation limitation)

Default:

org.optaplanner.core.api.domain.entity.PlanningEntity.NullPinningFilter.class

difficultyComparatorClass

Class<? extends Comparator> difficultyComparatorClass

Allows a collection of planning entities to be sorted by difficulty. A difficultyWeight estimates how hard is to plan a certain PlanningEntity. Some algorithms benefit from planning on more difficult planning entities first/last or from focusing on them.

The Comparator should sort in ascending difficulty (even though many optimization algorithms will reverse it). For example: sorting 3 processes on difficultly based on their RAM usage requirement: Process B (1GB RAM), Process A (2GB RAM), Process C (7GB RAM),

Do not use together with difficultyWeightFactoryClass().

Returns:

PlanningEntity.NullDifficultyComparator when it is null (workaround for annotation limitation)

See Also:

• difficultyWeightFactoryClass()

Default:

org.optaplanner.core.api.domain.entity.PlanningEntity.NullDifficultyComparator.class

difficultyWeightFactoryClass

Class<? extends SelectionSorterWeightFactory> difficultyWeightFactoryClass

The SelectionSorterWeightFactory alternative for difficultyComparatorClass().

Do not use together with difficultyComparatorClass().

Returns:

PlanningEntity.NullDifficultyWeightFactory when it is null (workaround for annotation limitation)

See Also:

• difficultyComparatorClass()

Default:

org.optaplanner.core.api.domain.entity.PlanningEntity.NullDifficultyWeightFactory.class